Retractable cover extraction for intravenous and other therapy needles

Abstract

A retractable multi-piece cover for use in removal of a needle delivery system over a central venous access port which is subcutaneously implanted into a patient. The multi-piece cover extends to surround the intravenous therapy needle during its removal from the port so that the person removing the needle is protected from the possibilities of spattering blood and needle stick resulting from needle rebound. The multi-piece cover may have an upper slit in its extendable upper portion, or a larger opening in its extendable upper portion covered with flexible material through which an intravenous therapy needle may access the port. The multi-piece cover may also have a clamp for securely attaching the multi-piece cover to the intravenous therapy needle. Applications may include, but are not limited to, use over subcutaneously arm-implanted ports and subcutaneously chest-implanted ports.

What is claimed is:  
     
       1. A multi-piece cover for use over a central venous access port needle delivery system which is subcutaneously implanted into a patient and for use with intravenous therapy and other indwelling needle systems used to access the central venous access port, the multi-piece cover comprising: 
       a first cover member having a bottom opening and a central top opening at its top surface;  
       a second cover member having an upper surface opening and a lower surface opening, said second cover member being slidedly positioned within the first cover member so as to be in a generally collapsed position within the first cover member for initial needle insertion into the patient;  
       the second cover member further being slidedly extendable through said top opening in the first cover member for removal of the needle from the patient; and  
       needle guarding means for the bottom opening of the first cover member,  
       wherein when the second cover member is collapsed into first cover member, the needle guarding means is in an open position from the bottom opening to allow the needle to be inserted into the patient, and  
       wherein when the needle is to be withdrawn from the patient, the second cover member is slidedly extended upwardly from the first cover member to maintain the needle within an area defined by the first cover member and the second cover member, and the needle guarding means is hingedly biased to a closed position across the bottom opening of the first cover member for protection during removal of the needle from spattering blood and needle stick resulting from needle rebound.  
     
     
       2. The multi-piece cover according to claim  1  wherein the upper opening in the second cover member comprises a needle accepting aperture slightly larger in diameter than said needle. 
     
     
       3. The multi-piece cover according to claim  1  wherein the needle guarding means comprises a needle guard hingedly attached to said first cover member and spring bias means for positioning the needle guard to the closed position across the bottom opening of the first cover member. 
     
     
       4. The multi-piece cover according to claim  1  further comprising stopping means for preventing the second cover member from extending upwardly beyond the central top opening of the first cover member. 
     
     
       5. The multi-piece cover according to claim  1  further comprising a needle clamp attached to the second cover member for securing a needle support portion of the needle against the second cover member upper surface during use. 
     
     
       6. The multi-piece cover according to claim  1  further comprising spring bias means to bias said second cover member into its extended position. 
     
     
       7. A multi-piece cover for use over a central venous access port needle delivery system which is subcutaneously implanted into a patient and for use with an intravenous therapy indwelling needle system used to access the central venous access port, the multi-piece cover comprising: 
       a first cover member having a bottom opening and a central top opening at its top surface;  
       a second cover member having an upper surface needle accepting aperture and a lower surface opening, said second cover member being slidedly positioned within said first cover member so as to be in a generally collapsed position within the first cover member for initial needle insertion into the patient;  
       the second cover member further being slidedly extendable through said top opening in the first cover member for removal of the needle from the patient; and  
       needle guarding means for the bottom opening of the first cover member attached to said first cover member,  
       wherein when the second cover member is collapsed into first cover member, the needle guarding means is in an open position from the bottom opening to allow the needle to be inserted through said upper surface needle accepting aperture into the patient, and  
       wherein when the needle is to be withdrawn from the patient, the second cover member is slidedly extended upwardly from the first cover member to maintain the needle within an area defined by the first cover member and the second cover member, and the needle guarding means is hingedly biased to a closed position across the bottom opening of the first cover member for protection during removal of the needle from spattering blood and needle stick resulting from needle rebound.  
     
     
       8. The multi-piece cover according to claim  7  wherein the needle guarding means comprises a needle guard hingedly attached to said first cover member and spring bias means for positioning the needle guard to the closed position across the bottom opening of the first cover member. 
     
     
       9. The multi-piece cover according to claim  7  further comprising a needle clamp attached to the second cover member for securing a needle support portion of the needle against the second cover member upper surface during use. 
     
     
       10. The multi-piece cover according to claim  7  further comprising stopping means for preventing the second cover member from extending upwardly beyond the central top opening of the first cover member. 
     
     
       11. A multi-piece cover for use over a central venous access port needle delivery system which is subcutaneously implanted into a patient and for use with an intravenous therapy and other indwelling needle systems used to access the port, the multi-piece cover comprising: 
       a first cover member having a bottom opening and a central top opening at its top surface;  
       a second cover member having an upper surface opening and a lower surface opening, said second cover member being slidedly positioned within the first cover member so as to be in a generally collapsed position within the first cover member for initial needle insertion into the patient;  
       the second cover member further being slidedly extendable through said top opening in said first cover member for removal of the intravenous therapy needle from the patient;  
       the second cover member also having stopping means for preventing the second cover member from extending upwardly beyond the central top opening of the first cover member; and  
       collapsible needle guarding means attached to said first cover member, the collapsible needle guarding means further including a plurality of generally triangular shaped portions, each portion being hingedly connected around an inside surface near the bottom opening of the first cover member,  
       wherein when the second cover member is collapsed into first cover member for needle insertion into the patient through the lower surface opening of the second cover member, the needle guarding means is upwardly directed between the first cover member and the second cover member, and  
       wherein when the second cover member is slidedly extended upwardly from the first cover member for withdrawal of the needle from the patient, the needle guarding means is biased downwardly clearing the stopping means to a closed position over the bottom opening of the first cover member so as to maintain the needle within an area defined by the first cover member, including the needle guarding means, and the second cover member for protection during removal of the needle from spattering blood and needle stick resulting from needle rebound.  
     
     
       12. The multi-piece cover according to claim  11  further comprising a lip about the inside bottom opening of the first cover member for maintaining the downwardly biased needle guarding means in the generally closed position over the bottom opening of the first cover member. 
     
     
       13. The multi-piece cover according to claim  12  further comprising finger grips in an outside surface of the first cover member.